<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        let arr=[2,6,1,77,52,25,7]
        let max=arr[0]
        let min=arr[0]
        for(let i=0;i<arr.length;i++){
            if(arr[i]>max){
                max=arr[i]
            }
        }
        alert(`数组的最大值为${max}`);
        for(let i=0;i<arr.length;i++){
            if(arr[i]<min){
                min=arr[i]
            }
        }
        alert(`数组的最小值为${min}`);
    </script>    
</body>
</html>